Date   : Tue, 23 Nov 2010 05:00:01 +0100
From   : rick@... (Rick Murray)
Subject: Harddisc fakery using a microcontroller

On 23/11/2010 02:23, J.G.Harston wrote:

> What you want is a hard drive equivalent of this:
> http://hxc2001.free.fr/floppy_drive_emulator

;-) I didn't realise at first when partway down the page it suddenly 
switched to French.


> What you need is the equivalent that quacks like a SCSI hard drive.

Floppy interface based around an 40Mhz PIC18F4620. I wonder if that has 
enough I/O to talk to an SD card and fake a SCSI bus? Looks like 15 pins 
are used on the floppy I/F, I'll need to dig out my old Morley booklet 
to see what SCSI has.


> The above directs all "disk accesses" to data read/writes in image
> files held in a FAT formatted SD card.

Yup, with LCD and LFN and SDHC... Mmmm, how much memory is onboard that 
little PIC?!


[later]

http://ww1.microchip.com/downloads/en/DeviceDoc/39626e.pdf

Good God!

Yeah... I think that'll probably to it.

I gotta get myself into this sort of thing. One of those, bit of 
veroboard...


Right. Last question. Is there a "PICS for dummies" book? ;-)


Best wishes,

Rick.

-- 
Rick Murray, eeePC901 & ADSL WiFI'd into it, all ETLAs!
BBC B: DNFS, 2 x 5.25" floppies, EPROM prog, Acorn TTX
E01S FileStore, A3000/A5000/RiscPC/various PCs/blahblah...